The International Agencies' Council
The International Agencies' Council (IAC) is a member of the European Commisson and European Association of Communications Agencies(EACA). It has the 13 largest international media agencies in Europe as its members. 
Board members of the International Agencies' Council
International Agencies that form the Council
As of February 2008: BBDO Europe Middle East and Africa | DDB Europe DDB International | Draftfcb emea | Euro RSCG | Grey Global Group EMEA | JWT | Leo Burnett Worldwide | McCann-Erickson Worldwide | Ogilvy & Mather Worldwide | Publicis Worldwide | Saatchi & Saatchi | TBWA Worldwide | Young & Rubicam Europe, Middle East & Africa
The IAC appears not to have a website but it is connected to the EACA.
There is conflicting information regarding the Chairman of the IAC board. On the Institute of Practitioners in Advertising (IPA) the Chairman of IAC is stated as being Bernard Barnett, whereas on the EACA website the chairman is listed as Mike Walsh. All of the board members of the IAC are from major advertising companies.